Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities - Nessus

Critical   Plugin ID: 15910

This page contains detailed information about the Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 15910
Name: Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities
Filename: w3who_dll.nasl
Vulnerability Published: 2004-12-06
This Plugin Published: 2004-12-06
Last Modification Time: 2021-01-19
Plugin Version: 1.24
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: http_version.nasl

Vulnerability Information

Severity: Critical
Vulnerability Published: 2004-12-06
Patch Published: N/A
CVE [?]: CVE-2004-1133, CVE-2004-1134
CPE [?]: N/A

Synopsis

It is possible to execute code on the remote host.

Description

The Windows 2000 Resource Kit ships with a DLL that displays the browser client context. It lists security identifiers, privileges and $ENV variables.

Nessus has determined that this file is installed on the remote host.

The w3who.dll ISAPI may allow an attacker to execute arbitrary commands on this host, through a buffer overflow, or to mount cross-site scripting attacks.

Solution

Delete this file.

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, Immunity Canvas)
Exploit Ease: No exploit is required

Here's the list of publicly known exploits and PoCs for verifying the Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities vulnerability:

  1. Metasploit: exploit/windows/isapi/w3who_query
    [Microsoft IIS ISAPI w3who.dll Query String Overflow]
  2. Exploit-DB: exploits/windows/remote/16354.rb
    [EDB-16354: Microsoft IIS - ISAPI 'w3who.dll' Query String Overflow (Metasploit)]
  3. Immunity Canvas: CANVAS

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:F/RL:OF/RC:C
CVSS Base Score:10.0 (High)
Impact Subscore:10.0
Exploitability Subscore:10.0
CVSS Temporal Score:8.3 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:8.3 (High)

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Plugin Source

This is the w3who_dll.nasl nessus plugin source code. This script is Copyright (C) 2004-2021 Nicolas Gregoire <[email protected]> 

#%NASL_MIN_LEVEL 70300
# 
# (C) Nicolas Gregoire <[email protected]>
#
# Rewritten by Tenable Network Security
#

# Changes by Tenable:
# - Revised plugin title, changed family (6/1/09)


include('deprecated_nasl_level.inc');
include('compat.inc');

if(description)
{
 script_id(15910);
 script_version("1.24");
 script_cve_id("CVE-2004-1133", "CVE-2004-1134");
 script_bugtraq_id(11820);

 script_name(english:"Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities");

 script_set_attribute(attribute:"synopsis", value:
"It is possible to execute code on the remote host." );
 script_set_attribute(attribute:"description", value:
"The Windows 2000 Resource Kit ships with a DLL that displays the browser 
client context. It lists security identifiers, privileges and $ENV variables. 

Nessus has determined that this file is installed on the remote host.

The w3who.dll ISAPI may allow an attacker to execute arbitrary commands 
on this host, through a buffer overflow, or to mount cross-site 
scripting attacks." );
 script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2004/Dec/174");
 script_set_attribute(attribute:"solution", value:
"Delete this file." );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");
 script_set_attribute(attribute:"metasploit_name", value:'Microsoft IIS ISAPI w3who.dll Query String Overflow');
 script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
 script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
 script_set_attribute(attribute:"canvas_package", value:'CANVAS');
 script_cwe_id(20, 74, 79, 442, 629, 711, 712, 722, 725, 750, 751, 800, 801, 809, 811, 864, 900, 928, 931, 990);

 script_set_attribute(attribute:"plugin_publication_date", value: "2004/12/06");
 script_set_attribute(attribute:"vuln_publication_date", value: "2004/12/06");

 script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_end_attributes();

 script_summary(english:"Determines the presence of w3who.dll");
 script_category(ACT_ATTACK);
 script_copyright(english:"This script is Copyright (C) 2004-2021 Nicolas Gregoire <[email protected]>");
 script_family(english:"CGI abuses");
 script_dependencie("http_version.nasl");
 script_require_ports("Services/www", 80);
 exit(0);
}

#
# The script code starts here
#

include("global_settings.inc");
include("http_func.inc");
include("http_keepalive.inc");

port = get_http_port(default:80, embedded:TRUE);

sig = get_kb_item("www/hmap/" + port + "/description");
if ( sig && "IIS" >!< sig ) exit(0);

req  = http_get(item:"/scripts/w3who.dll", port:port);
res  = http_keepalive_send_recv(port:port, data:req);

if ("Access Token" >< res && "Environment variables" >< res)
{
 req  = http_get(item:"/scripts/w3who.dll?bogus=<script>alert('Hello')</script>", port:port);
 res  = http_keepalive_send_recv(port:port, data:req);

 if ("<script>alert('Hello')</script>" >< res)
 {
   security_hole(port);
   set_kb_item(name: 'www/'+port+'/XSS', value: TRUE);
 }
}

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/w3who_dll.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\w3who_dll.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/w3who_dll.nasl

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How to Run

Here is how to run the Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select CGI abuses plugin family.
  6. On the right side table select Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities plugin ID 15910.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl w3who_dll.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a w3who_dll.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - w3who_dll.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state w3who_dll.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: CWE | Common Weakness Enumeration:
  • CWE-20 (Weakness) Improper Input Validation
  • CWE-74 (Weakness) Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  • CWE-79 (Weakness) Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-442 (Category) DEPRECATED: Web Problems
  • CWE-629 (View) Weaknesses in OWASP Top Ten (2007)
  • CWE-711 (View) Weaknesses in OWASP Top Ten (2004)
  • CWE-712 (Category) OWASP Top Ten 2007 Category A1 - Cross Site Scripting (XSS)
  • CWE-722 (Category) OWASP Top Ten 2004 Category A1 - Unvalidated Input
  • CWE-725 (Category) OWASP Top Ten 2004 Category A4 - Cross-Site Scripting (XSS) Flaws
  • CWE-750 (View) Weaknesses in the 2009 CWE/SANS Top 25 Most Dangerous Programming Errors
  • CWE-751 (Category) 2009 Top 25 - Insecure Interaction Between Components
  • CWE-800 (View) Weaknesses in the 2010 CWE/SANS Top 25 Most Dangerous Programming Errors
  • CWE-801 (Category) 2010 Top 25 - Insecure Interaction Between Components
  • CWE-809 (View) Weaknesses in OWASP Top Ten (2010)
  • CWE-811 (Category) OWASP Top Ten 2010 Category A2 - Cross-Site Scripting (XSS)
  • CWE-864 (Category) 2011 Top 25 - Insecure Interaction Between Components
  • CWE-900 (View) Weaknesses in the 2011 CWE/SANS Top 25 Most Dangerous Software Errors
  • CWE-928 (View) Weaknesses in OWASP Top Ten (2013)
  • CWE-931 (Category) OWASP Top Ten 2013 Category A3 - Cross-Site Scripting (XSS)
  • CWE-990 (Category) SFP Secondary Cluster: Tainted Input to Command
See also: Similar and related Nessus plugins:
  • 11370 - Microsoft IIS fpcount.exe CGI Remote Overflow
  • 59817 - Microsoft IIS 6.0 PHP NTFS Stream Authentication Bypass
  • 10564 - Microsoft IIS Phone Book Service /pbserver/pbserver.dll Remote Overflow

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file w3who_dll.nasl version 1.24. For more plugins, visit the Nessus Plugin Library.

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